Question

1.) activation of T-cells requires antigens presentation and ___

a.) complement

b.) antibodies

c.) MCH interactions

d.) transformations

2.) after the inital immune response to an antigen,____ provide for very rapid immune response during subsequent exposure to thay anitgen

a.) plasma cells

b.) memoery cells

c.) antigen presenting cells

d.) antibodies

3.) lymph is returned to the blood on the ___ side of circulation.

a.) pulmonary

b.) venous

c.) cardiac

d.) arterial

Answer 1

Answer 1: C - MHC interactions.

Explanation : To activate a naive T cell to proliferate and differentiate into an effector cell, APC provides three kinds of signals. Signal 1 is generated by the interaction of TCR-CD3 complex with an MHC peptide complex on an APC. (Antigen presenting cell).

Answer 2: B- memory cells.

Explanation - memory cells have the ability to recall previous contact with a foreign molecule and respond to it in a learned-manner that is, with a more rapid and larger response.

Answer 3: B- venous

Explanation - lymphatic fluid is transported to lymphatic vessels via lymph nodes for removal of substances by tissue lymphocytes and addition of circulating lymphocytes before they are completely emptied into the subclavian vein to get mixed with the venous blood.